<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{city}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <ul class="button-list">
          <li class="button-wrapper" @click="handleCityButton(item.name)" v-for="item in hotCities" :key="item.id">
            <div class="button">{{item.name}}</div>
          </li>
        </ul>
      </div>
      <!--字母区块-->
      <div class="area" v-for="(item, key) in cities" :ref="key" :key="key">
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div class="item border-bottom" @click="handleCityButton(v.name)" v-for="v in item" :key="v.id">
            {{v.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
import {mapState, mapMutations} from 'vuex'
export default {
  name: 'CityList',
  props: ['cities', 'hotCities', 'letter'],
  mounted () {
    this.scoll = new BScroll(this.$refs.wrapper, {click: true})
  },
  computed: {
    ...mapState(['city'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const elLetter = this.$refs[this.letter][0]
        this.scoll.scrollToElement(elLetter)
      }
    }
  },
  methods: {
    handleCityButton (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  }
}
</script>

<style lang="stylus" scoped>
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .44rem
      background-color: #eee
      padding-left: .2rem
      font-size: .26rem
      color: #666
    .button-list
      overflow: hidden
      padding: .1rem .6rem .1rem .1rem
      .button-wrapper
        float: left
        width: 33.33%
        .button
          margin: .1rem
          padding: .1rem 0
          text-align: center
          border: .02rem solid #ccc
          border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>
